/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshAttributeSet.h
virtual void OnSplitVertex ( const [DynamicMeshInfo::FVertexSplitInfo](API\Runtime\GeometryCore\DynamicMesh\FVertexSplitInfo) & SplitInfo, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< const int > & TrianglesToUpdate )